Become a minister and submit to PM’s whims? (4,6)

I believe the answer is:

take orders

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'become a minister and submit to pm's whims?' is the definition.
I can't judge whether this defines the answer.

'become a minister and submit to' is the wordplay.
'become a minister' becomes 'orders' (I can't justify this - if you can you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'submit to' becomes 'take' (synonyms).
'orders' after 'take' is 'TAKE ORDERS'.

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I've seen this clue in The Times.

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